Soap



FIG. 1 is a front perspective view of the soap of the present invention showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a right side view thereof.

The sides not shown in the drawings form no part of the claimed design. 

The ornamental design for a soap, as shown and described. 